Qualitative Filter Paper Circles 94 mm - 20 Micron, Set of 3x100

In this review of the qualitative filter paper circles, the bottom line is simple: these discs are aimed at labs, classrooms and hobbyists who need reliable, low-cost particle separation for routine qualitative work. The reviewer found the 94 mm diameter sheets provide consistent filtration for common tasks such as water testing and vacuum filtration in 10 cm Buchner funnels, and the standout reason to buy is the combination of coarse 20 micron retention and steady filtration speed that balances throughput with effective particle removal. The set of three boxes of 100 makes this a practical, value-oriented choice.

Key Features

• 94 mm Diameter: The paper fits most standard 10 cm Buchner funnels and provides a full-coverage disc for even filtration.
• 20 Micron Particle Retention: Coarse cellulose fibers reliably remove particles larger than 20 micron for general qualitative separations.
• Filtration Speed: With a reported 35 - 70 second range, the sheets offer a predictable balance between speed and clarity for routine lab tasks.
• Material and Ash Content: Made from cellulose with low ash content (0.15%), the paper leaves minimal residue after drying and is suitable for many qualitative analyses.
• Pack Size and Value: The set includes three boxes of 100 pieces, which makes it economical for repeated use over multiple experiments or classroom settings.
• Warranty and Support: The brand offers a 12 month limited warranty and customer service promise, providing recourse if any items arrive damaged.

Who It's For

This product is best for small laboratories, educational institutions and hobbyists who perform routine qualitative filtration, such as water clarity checks, sample cleanup before analysis, or particulate removal from suspensions. The coarse 20 micron retention and medium filtration speed make these discs well suited to tasks where throughput and simplicity are more important than fine analytical separation.

Users who need absolute fine particle retention, specialized chemically resistant media, or certified quantitative filter paper for trace analysis should look elsewhere. For general-purpose filtration and workshops that require a steady supply of discs, this set offers clear practical value.

Pros & Cons

Pros

• Good value for bulk purchases with three boxes of 100 pieces each, reducing repeated reordering.
• Consistent filtration behavior reported by users, particularly effective in water filtration systems.
• Low ash content helps reduce residue after drying, useful for qualitative observations.
• Fits common 10 cm Buchner funnels for many users, providing convenient compatibility.

Cons

• Some users reported the discs can be slightly large for certain funnels, requiring slight trimming or adjustment.
• Coarse 20 micron retention is not suitable for applications that require fine particle capture or certified quantitative results.

Specifications

Product Type	Qualitative filter paper circles
Diameter	94 mm
Particle Retention	Approximately 20 micron
Filtration Speed	35 - 70 sec
Ash Content	0.15%
Pack Quantity	3 boxes x 100 pcs
Warranty	12 months limited warranty and customer service

Our Verdict

The 94 mm qualitative filter paper circles deliver reliable, economical performance for general laboratory and classroom filtration tasks; they are a sensible buy for users who need coarse 20 micron retention, decent filtration speed, and low ash residue in bulk quantities. Those needing finer retention or specialized certifications should consider other media, but for routine qualitative work this set represents good value and dependable results.

Frequently Asked Questions

Will these fit a 10 cm Buchner funnel?
Yes; the 94 mm diameter is reported to fit most 10 cm Buchner funnels, though a few users found the discs slightly large for specific funnel models.

What particle size do they retain?
These are coarse cellulose discs that generally retain particles larger than about 20 micron, suitable for routine qualitative separations.

What happens if a box arrives damaged?
The brand provides a 12 month limited warranty and asks customers to contact support immediately so issues can be resolved.